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Finding the Fourth Proportional to 520,069.35, 780,104.03 and 254,000.55

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Solution

The fourth proportional to 520,069.35, 780,104.03 and 254,000.55 is: 381,000.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,069.35 : 780,104.03 = 254,000.55 : x
  2. Step 2: Convert to fraction form
    520,069.35/780,104.03 = 254,000.55/x
  3. Step 3: Cross multiply
    520,069.35x = 780,104.03 × 254,000.55
  4. Step 4: Simplify right side
    520,069.35x = 198,146,852,677.22
  5. Step 5: Solve for x
    x = 198,146,852,677.22/520,069.35
  6. Step 6: Final answer
    x = 381,000.83

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.